Might be that they are every where as the name implies commonwhore plus ive herd nothing but bad news about commodores and and some model falcons, But i have never owned one personaly and probably never will. ;)
Like Mr Revhead said local papers and trademe are good spots.
Ebay is also a very good spot, Sometimes they have NOS(New Old Stock)parts for older model toyota's etc.....
Good luck with the project. :D
We got the 4k and the auto out of my ke70 last night.big thanks to teddy and medicine_man for doing most of the work again. :D
Remember to drain the gearbox and engine of its oil before removing.